tigerlihao

This plugin can let you add mathematical equations to your posts using latex. 
Google chart API is used in this plugin to turn the latex strings to equation images. 
The equation images will be stored on your site, so it will be efficient.
To add equations in your articles, just surround the latex script with <code>[eq]</code> and <code>[/eq]</code> tags. 
For example, add following codes <code>[eq]\alpha+\beta\geq\gamma[/eq]</code> in your posts.

Google Equation for WordPress

Using Google chart API for LaTeX to add mathematical equations as images.

pacius

MarkDennehy

Draws a graph of single set of date related data. Graph can be made public (i.e. sidebar widget or static page) and the data can be manipulated through dashboard. Many people use this plugin for weight tracking on their blogs (as do I), but it has been used for many other things as well. Only requirement – or rather a constraint – is that the horizontal axis of the graph shows dates. The vertical axis can hold any values. Each user can have their own graphs, which can be easily inserted in posts and pages.
<h3>Content filter</h3>
If you want to insert a graph in posts and/or pages, simply write a string similar to following in your post or page.
[[simple-graph n=1 x=0 y=0 trend=0 wkly=0 lm=0 ytd=0 uid=0 gid=0 ]]
Just replace the values as you wish. The ones above are default values, and if you don’t need to change the default value, you can simply omit that value from the string. I.e. [[simple-graph]] alone produces the graph with default values drawn from widget setup.
<ul>
<li>n is number of widget options, from where default options (such as colours) are drawn</li>
<li>x is width, any positive value is acceptable</li>
<li>y is height, any positive value is acceptable</li>
<li>trend is whether trend graph is shown, 0 = no, 1 = yes</li>
<li>wkly is whether weekly averages are shown, 0 = no, 1 = yes</li>
<li>lm is whether only values from last month are shown, 0 = no, 1 = yes</li>
<li>ytd is whether only values from last year are shown, 0 = no, 1 = yes</li>
<li>uid is user ID of the graph owner (see WordPress dashboard -> Users)</li>
<li>gid is user-specific graph number, same as in widget control panel’s graph# selection</li>
</ul>

Simple Graph

Draws a line graph of single set of date related data. Graph can be made public (i.e. sidebar widget or static page) and the data can be edited throug …

Google Equation for WordPress vs Simple Graph